Rectifying system.



I 1. loyed UNI'TED' s T s A PATENT OFFICE.-

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, To all whomitmaycomem:

Be it known thht I, 'Enermm F. 'Srrrrsa,

' a citizen of theUnite'd States, and a resident of willtinsbur inthe county of Allegheny 5 and Sta '(of l ennsylvania, have invented a new; 11 ,ilsefiul lmprovenient 1n l tect fylng ,Syst ezi|s,"of which.the. following is a speci- "-3 inventionrelates to arectify ng system gand it has forits object provide connoqti'ons wlfpreby tra for ng means, em-

toderive cu' ntf m a scurce,w1ll 'at a h gher elliciency than has possible 'wit liythe systems of connecu been "llition's 'hit er'toem'p oyed/ 2 Ike ing flan he s un Jim-fist m m w n w, a y The man ed employed hitherto for 20" the rectifiqetion-oflalternating-c t by meansf-o fa has been tg 'liipdes o I e ndu'ctors to a t e o amatmg' current source and to' meet t "cathodes of the tel-mediate potential of the -,source,such, for

example, as the mid point of these'condary windmg of a transformer, In a great-many i localities, it is essential that current from b to a been lied 'meanso atransformer n Pp ins ation,

80 an alternating-current only'm order thatproper'vol had, but, also that therectifyin; circuit be insulated from the mam-ysuply circuit. use of such'tram amers and the above method'f-"of connections, each halffpfthe r ns ormer secondary ding is active only "on alter: hgte half cycles. Thi's eper'io'dic inactivity d the different patient-bf the secondary winding ntetes the employment of more iron and of more copper than would otherwise be fry,- ntatmg not only greater weight and bulkn the transformer, but also greater iron and co per losses. By my invention, I obviate t ese disadvantages and employ a transformer wherein all portions of the secondary wind i are active \during each half cycle.

eferring to the accompanying drawing, 1 is a transformer having the terminals of its primary winding v2 connected to the mains 3 and 4 of a suitable supply circuit.

conductors throu gh a d to a point of in- Patented Aug. '7, 1917.

I Application. filed Kay 25, 1Q. Serial lie. 840,728.

"Thetransformer '1 is provided with two secondary windings 5 and 6. The two terminals of the winding 5 are connected,- re- 'spectively, to the modes 7 and 8 of two asymmetric conductors 9 'and 10, preferably of the mercury arc type. The terminals of .the winding 6 are connected, respectively, to

: the',cathodes 11 and 12 of the-rectifiers!) and 10.'.'Any suitable load, such, for example, .a's a motor 13, is connected between the cathode 11 and the anode 8, and a similar load-14 is connected between the anode 7 andthecathode 12. The rectifiers 9 and are' st erted and their continuous operation assured by any suitable means, such, for'exa'mplzkaslreep-alive circuits 15 and 16.

us described the arrangement offthe d fierent elements of my system the opgrwtion'is as follows: Assuming a positive T- vrave to flow from the main 3 as indicated by anyarrow 17, secondary currents will be a 4 .indiiced'inthe windings 5 and 6, as indiinduced current wave from the '5 will traverse the rectifier 9 and the 10a 13, and return to the other terminal of the winding. At the same time, the induced current .wave from the wind' 6 will traverse the motor 14 and the rectifier 9, and return to the other terminal ofthe winding 6, all as indicated full-line arfrows in'the various parts of t e system. A half 0 cle later, aapositive wave .flowing 4:, in arrow 18 will induce current waves in the two win 51nd 6, as indicated by the dotted-line arrows adyacerit thereto. The wave from the winding 5' will traverse the rectifier 8 and the motor 14, while the wave from the win 8 will traverse the motor 18 and the er8. It is thus seen that wig the full-line arrows adjacent there to. e

the direction of current flow through the motor-s18- and 14 is, at all times, the same:

the term nominal in referring to the polarity cated by a dotted-line of the respective electrodes, thereby designating the polarity of the electrodes when actively employed-in carrying load current.

Obviously, with a four motor vehicle, half the motors maybe connected as is the motor 13. and half the motors may be connected as is the'motor 14. Generally speaking, my system of rectification may be applied in any place where the old systems have been employed, 'the only limitation being that the load must be divided into two substan tially equal parts.

I claim as my invention: V I 1. Thecombinat'ion with two sources of alternating current substantially in phaseing the anode of one asymmetric conductor and the cathode of the other asymmetric conductor, and a load. circuit connecting the of like nominal polarity, respectively, conhections from the two terminals of the other secondary winding to the two terminals of said units of theother nominal polarity, re-

spectively, a load circuit connecting a tery minal of one nominal polarity of one asymmetric unit to the terminal of the othcr nominal polarty of the other unit, and an additional load circuit connecting the remaining terminals of said units.

In testimony whereof, I have hereunto subscribed my name this 19th day of May, 4-5 1914. F

EDMUND F. SI Pl-l Fill. Witnesses: r

D. E. Canrsn'mn B, B. Hun-2s. 

